Multiple 'Create Account' Forms

[point4design]

I have a site that needs 2 maybe three different types of 'create account' forms. The first would be the standard form. The second would be for Wholesalers to login (would require EIN/Tax ID, etc). And the third would have a few other different forms. What's the best approach for me to take to make these customizations? What files would I need to make changes to? Any other ideas?

[schoolboy]

Additional input fields will also require additional database modifications. And then there's the question of how the data must inter-relate across other functional parameters of the site - such as tax and pricing...

This could be quite a detailed job...

[point4design]

So has anyone done this before? I guess the big question is how do I know which files I'd need to make changes to?

[schoolboy]

The files are the easier part... its the database that's the challenge.

This would probably have to be built as a module - not something you can do by simply tweaking the core code.